Windows 2008 smb encryption

I hope that the reply will assist you in getting your query addressed. In case you require further assistance, please do reply to the thread as we are always available to your queries. Please remember to click "Mark as Answer" on the post that helps you as this can be beneficial to other community members reading the thread. And vote as helpful. Just for clarification, where is your file share storage account is located? Could you elaborate your scenario? The content you requested has been removed.

Ask a question. Quick access. We need to move on to preventing outbound and lateral network communications. Your network forms segments and endpoints. Your servers and clients are the endpoints. Our goal here is to make it much harder for your data to leave the network or for your devices to attack each other within the network. We are not trying to make the entire network impervious to all threats. We are trying to make your network so irritating to an attacker that they just lose interest and go after some other target.

The easiest part that you probably already completed. You should be restricting that outbound traffic to only those service IP ranges.

We document those here:. DCs and file servers probably need to be accessed from anywhere inside the network, but some application server might just need access from two other application servers on the same subnet. You enable it as part of group policy and deploy to whatever set of nodes you want to check. Of course! But we can talk tactics.

The key thing to understand is blocking both inbound and outbound communications in a very deterministic way using rules that include exceptions and add additional connection security.

Email them a link, convince them to click, and now they are sending along NTLM credentials or running mean executables. An outbound firewall policy that prevents use of SMB connections not just outside the safety of your managed network but even inside your network to only allow access to the minimum set of servers and not any other machines is true lateral movement defense. This KB covers the precise SMB firewall rules you need to set for inbound and outbound connections to match your inventory.

I want to call out a few important points in that KB:. Open Connection Security Rules, create a new Isolation rule. Use the default Requirement "Request authentication for inbound and outbound connections. Set for all profiles, name your rule, and save. Remember that this must be done for all computers - clients and servers - participating in your new inbound and outbound rules or they will be blocked from connecting SMB outbound.

When you provide these secure connection options, you now get access to scopes like authorized computers and IP address:. The defensive impact of this layering means attackers must determine which small set of allowed servers are valid targets that must be controlled or replaced without detection, all within your inner network. This improves efficiency by reducing redirection traffic between file server nodes. Clients are redirected following an initial connection and when cluster storage is reconfigured.

Windows 8. This results in a significant performance improvement. These improvements are evident when using higher speed network interfaces, such as 40 Gbps Ethernet and 56 Gbps InfiniBand. Enables administrators to perform hardware or software maintenance of nodes in a clustered file server without interrupting server applications storing data on these file shares.

Also, if a hardware or software failure occurs on a cluster node, SMB clients transparently reconnect to another cluster node without interrupting server applications that are storing data on these file shares. This provides better utilization of network bandwidth and load balancing of the file server clients, and optimizes performance for server applications. Enables aggregation of network bandwidth and network fault tolerance if multiple paths are available between the SMB client and server. This enables server applications to take full advantage of all available network bandwidth and be resilient to a network failure.

Supports the use of network adapters that have RDMA capability and can function at full speed with very low latency, while using very little CPU. These counters are specifically designed for server applications, such as Hyper-V and SQL Server, which store files on remote file shares. In addition, large Maximum Transmission Unit MTU is turned on by default, which significantly enhances performance in large sequential transfers, such as SQL Server data warehouse, database backup or restore, deploying or copying virtual hard disks.

With Windows PowerShell cmdlets for SMB, an administrator can manage file shares on the file server, end to end, from the command line. Provides end-to-end encryption of SMB data and protects data from eavesdropping occurrences on untrusted networks. It may be configured on a per share basis, or for the entire file server, and may be enabled for a variety of scenarios where data traverses untrusted networks.

Improves application response times in branch offices. With the use of directory leases, roundtrips from client to server are reduced since metadata is retrieved from a longer living directory cache. Cache coherency is maintained because clients are notified when directory information on the server changes. Directory opportunistic locks oplocks and oplock leases were introduced in SMB 3.

In SMB 3, the Windows implementation of SMB has been refined to improve the caching behavior on the client as well as the ability to push higher throughputs.